This will be the last mission in Operation 1

You start off where you left off, still in your Bushwacker, provided you didn't switch to a salvaged 'mech.
Your objectives for this mission are to:

A) Destroy The Greenhouses
B) Get rid of the Smoke Jaguar forces
C) Destoy a power plant
D) Destory the Laser Turrets
E) Make sure you saty alive this mission

Here's what to do.

You start off where you left the last mission, facing a set of Green Houses, but don't start shooting. Take two steps forward (So it seemed) and 2 'mechs will power up, one should be a firefly and the other should be either a Black Hawk or a Bushwacker. Get rid of them A.S.A.P. You don't want them to stir up trouble this close to your MFBs. Once the 'mechs are toast, proceed to the area where Dominic Paine would be, and get him to follow you back to the Greenhouses. Start destroying them.

Once they are rubble on the ground, two more 'mechs will try to get rid of you. They are either and Owens or a Firefly and the other one will be another Shadowcat. Destory them by taking out a leg. Then proceed to the Power Plant and blow it to smithereens. Congrats, you've already won half the mission.

Now for the hard part...

There's an Orion 'mech on the island to the north. Don't take it out yet. Arm you LRMs and target the Laser Turrets. Two salvos to each will destroy them. Now for the fun.

Head into the water deep so you become entirely submerged, and destroy the bridge, so the Orion can't get across. Now get out of the water, but no entirely: Half in, half out, so you bleed heat off faster.Select your ER Large Laser and blow the hell out of the Orion. If you get impatient, highlight your AC 10 and run screaming towards the Orion and shoot its legs to take it out with precision. One the Orion's downed, destroy the 'mech production factory, and you've won.